本文介绍了潘三矿选煤厂重介质密度自控系统的构成和工作原理，总结了该系统设计的特点，并分析了该系统在实际运行中存在的问题，提出了改进的措施。
The problems of the old heavy medium system are analyzed, the reform measures are made, and the resule of the reform is introduced, which have a certain reference significance.
直到老潘和家人驱车周游中国三个月后，他才开始了解中国。
Lao Pan did not begin to understand China until he and his family took a 3-month drive around the country.
潘基文说，这三方都对他表示，他们正致力于解决他们迫切面临的问题，并且他们都希望和平进程能够继续。
Mr. Ban said all told him they are committed to finding solutions to the problems immediately before them and all want to keep the peace process going.
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